Weather Alert in Alaska
Special Weather Statement issued August 11 at 7:36AM AKDT by NWS Juneau AK
AREAS AFFECTED: City and Borough of Juneau
DESCRIPTION: As of 7:30 AM Monday, the USGS web camera and laser gage in Suicide Basin continue to show indications of over-topping the ice dam with icebergs being pulled towards the overflow channel and very little new water rise. This means the basin is at full capacity and in the past it has taken up to 6 days for the outburst flooding event to begin. The water level in the basin will slowly fall as the overflow channel erodes. A faster drop in water levels in the basin along with a rise on Mendenhall Lake will indicate a sub-glacier release and our office will issue a Flood Warning. From that point, the outburst flooding event would take about 48 hours to peak. Now is the time to finish up the flood preparation/planning and get those plans "SET" so they can be put into action, and "GO" when a Flood Warning is issued. Check back regularly for updates on this evolving situation.
INSTRUCTION: N/A
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Weather Topic: What are Altocumulus Clouds?
Home - Education - Cloud Types - Altocumulus Clouds
Next Topic: Altostratus Clouds
Similar to cirrocumulus clouds, altocumulus clouds are
characterized by cloud patches. They are distinguished by larger cloudlets
than cirrocumulus clouds but are still smaller than stratocumulus clouds.
Altocumulus clouds most commonly form in middle altitudes (between 2 and 5 km)
and may resemble, at times, the shape of a flying saucer.
These uncommon formations, called altocumulus lenticularis, are created by uplift
in the atmosphere and are most often seen in close proximity to mountains.
Next Topic: Altostratus Clouds
Weather Topic: What are Cirrocumulus Clouds?
Home - Education - Cloud Types - Cirrocumulus Clouds
Next Topic: Cirrostratus Clouds
Cirrocumulus clouds form at high altitudes (usually around 5 km)
and have distinguishing characteristics displayed in a fine layer of
small cloud patches. These small cloud patches are sometimes referred to as
"cloudlets" in relation to the whole cloud formation.
Cirrocumulus clouds are formed from ice crystals and water droplets. Often, the
water droplets in the cloud freeze into ice crystals and the cloud becomes a
cirrostratus cloud. Because of this common occurrence, cirrocumulus cloud
formations generally pass rapidly.
Next Topic: Cirrostratus Clouds
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